Hort Update for November 1, 2021

Hort Update for November 1, 2021

Seasonal information for Nebraska's green industry professionals.

Serious Concerns
1. Perennial garden cleanup - Optimize plant health; protect pollinators and other beneficial insects
2. November growing degree days (GGD) - Lincoln Airport 11/1/21 - 4000 GGD Understanding Growing Degree Days
3. Spotted lanternfly update  - Be on the look out for this new invasive insect; has not been found in Nebraska yet
4. Thousand cankers disease - Confirmed in Cheyenne, WY in August 2021; walnut twig beetles found in Gering, NE April 2020
5. Emerald ash borer  - New confirmation in Platte County; spring best time for treatment
6. Evergreen winter watering & anti-transpirants  - Continuing dry conditions increase potential for winter desiccation; watering and anti-transpirant applications can help
7. Fruit tree fall fallow watering - Best practice for home and commercial fruit production
8. Fall garden cleanup - Fruits, vegetables and landscape plants; fall garden sanitation helps control pests and diseases

Timely Topics
9. Winter weather forecast -Forecast for near normal temperature & precipitation; or slightly colder
10. Nuisance home invading insects, spiders and mice - Exclusion is the best control
11. Cluster flies in the home - Nuisance fall invader; winter control
12. Brown marmorated stink bug - Newest nuisance fall invading pest
13. Wildlife damage - Damage prevention is best; visit Wildlife.unl.edu for additional information
14. Black knot disease of plums - Prune and destroy branches with galls before April 1st
15. Cankers - Inspect trees in winter for signs of disease